""Tonight's story, Strychnine in the Soup, tells how a young interior decorator won the hand of the girl he loved against all the odds, but not without a little dirty work behind the scenes...""

Amelia Bassett and interior designer Cyril Mulliner, two mystery buffs, fall madly in love. But Amelia's mother, a rough-and-ready huntress, objects to their engagement because of Cyril's occupation.

Cyril plans to confront his prospective mother-in-law at a country house weekend they all attend.